Basic Chocolate Icing

A versatile chocolate icing, especially good on chocolate cake.

Chocolate Icing

1/2 cup (1 stick) butter
2/3 cup cocoa
3 cups powdered sugar
1/3 cup milk
1 teaspoon vanilla extract

Melt butter. Stir in cocoa. Alternately add powdered sugar and milk, beating to spreading consistency. Add small amount additional milk, if needed. Stir in vanilla. Spread onto chocolate cake.